status, milestone changed; resolution set

Barend Gehrels — Thu, 22 Mar 2012 18:32:49 GMT

status new → closed
resolution → fixed
milestone To Be Determined → Boost 1.50.0

Thanks for your report.

This has been solved in the meantime one or two weeks ago, in Boost.Trunk. Polygons with less then 3 points or an area of 0.0 are filtered out. This solves this issue.

snubdodecahedron@… — Fri, 23 Mar 2012 11:06:57 GMT

I updated to the trunk a few hours ago. I am hitting the same problem but this time on a different set of input polygons. Thanks for your time.

Craig

#include <cstdio>
#include <vector>
#include <boost/geometry.hpp>
#include <boost/geometry/geometries/point_xy.hpp>
#include <boost/geometry/geometries/polygon.hpp>
#include <boost/geometry/geometries/register/point.hpp>
#include <boost/geometry/geometries/register/ring.hpp>
#include <boost/geometry/io/wkt/wkt.hpp>
#include <boost/geometry/multi/geometries/multi_polygon.hpp>
typedef boost::geometry::model::polygon<boost::geometry::model::d2::point_xy<double> > polygon;
typedef boost::geometry::model::multi_polygon<polygon> multi_polygon;
int main()
{
    polygon green, blue;
    multi_polygon output;
    boost::geometry::read_wkt(
        "POLYGON((0.63872330997599124913 0.25963790394761232516 , 0.51901482278481125832 0.36860892060212790966 , 0.24443514109589159489 0.62663296470418572426 , 0.41175117865081167778 0.47178476291601745274 , 0.63872330997599124913 0.25963790394761232516))", green);
    boost::geometry::read_wkt(
        "POLYGON((0.52364358028948876367 0.36823021165656988352 , 0.7762673462275415659 0.13443113025277850237 , 0.59446187055393329146 0.29992923303868185281 , 0.52364358028948876367 0.36823021165656988352))", blue);
    boost::geometry::correct(green);
    boost::geometry::correct(blue);
    boost::geometry::detail::overlay::has_self_intersections(green);
    boost::geometry::detail::overlay::has_self_intersections(blue);
    printf("A\n");
    boost::geometry::intersection(green,blue,output);
    printf("B\n");
    boost::geometry::detail::overlay::has_self_intersections(output);
    printf("C\n");
    return 0;
}

Boost C++ Libraries: Ticket #6696: boost::geometry::intersection on two triangles creates self-intersecting polygon

status, milestone changed; resolution set